1 //===-- ARMAsmPrinter.cpp - Print machine code to an ARM .s file ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to GAS-format ARM assembly language.
13 //===----------------------------------------------------------------------===//
15 #include "ARMAsmPrinter.h"
17 #include "ARMConstantPoolValue.h"
18 #include "ARMFPUName.h"
19 #include "ARMMachineFunctionInfo.h"
20 #include "ARMTargetMachine.h"
21 #include "ARMTargetObjectFile.h"
22 #include "InstPrinter/ARMInstPrinter.h"
23 #include "MCTargetDesc/ARMAddressingModes.h"
24 #include "MCTargetDesc/ARMMCExpr.h"
25 #include "llvm/ADT/SetVector.h"
26 #include "llvm/ADT/SmallString.h"
27 #include "llvm/CodeGen/MachineFunctionPass.h"
28 #include "llvm/CodeGen/MachineJumpTableInfo.h"
29 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
30 #include "llvm/IR/Constants.h"
31 #include "llvm/IR/DataLayout.h"
32 #include "llvm/IR/DebugInfo.h"
33 #include "llvm/IR/Mangler.h"
34 #include "llvm/IR/Module.h"
35 #include "llvm/IR/Type.h"
36 #include "llvm/MC/MCAsmInfo.h"
37 #include "llvm/MC/MCAssembler.h"
38 #include "llvm/MC/MCContext.h"
39 #include "llvm/MC/MCELFStreamer.h"
40 #include "llvm/MC/MCInst.h"
41 #include "llvm/MC/MCInstBuilder.h"
42 #include "llvm/MC/MCObjectStreamer.h"
43 #include "llvm/MC/MCSectionMachO.h"
44 #include "llvm/MC/MCStreamer.h"
45 #include "llvm/MC/MCSymbol.h"
46 #include "llvm/Support/ARMBuildAttributes.h"
47 #include "llvm/Support/COFF.h"
48 #include "llvm/Support/CommandLine.h"
49 #include "llvm/Support/Debug.h"
50 #include "llvm/Support/ELF.h"
51 #include "llvm/Support/ErrorHandling.h"
52 #include "llvm/Support/TargetRegistry.h"
53 #include "llvm/Support/raw_ostream.h"
54 #include "llvm/Target/TargetMachine.h"
58 #define DEBUG_TYPE "asm-printer"
60 void ARMAsmPrinter::EmitFunctionBodyEnd() {
61 // Make sure to terminate any constant pools that were at the end
65 InConstantPool = false;
66 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
69 void ARMAsmPrinter::EmitFunctionEntryLabel() {
70 if (AFI->isThumbFunction()) {
71 OutStreamer.EmitAssemblerFlag(MCAF_Code16);
72 OutStreamer.EmitThumbFunc(CurrentFnSym);
75 OutStreamer.EmitLabel(CurrentFnSym);
78 void ARMAsmPrinter::EmitXXStructor(const Constant *CV) {
79 uint64_t Size = TM.getDataLayout()->getTypeAllocSize(CV->getType());
80 assert(Size && "C++ constructor pointer had zero size!");
82 const GlobalValue *GV = dyn_cast<GlobalValue>(CV->stripPointerCasts());
83 assert(GV && "C++ constructor pointer was not a GlobalValue!");
85 const MCExpr *E = MCSymbolRefExpr::Create(GetARMGVSymbol(GV,
87 (Subtarget->isTargetELF()
88 ? MCSymbolRefExpr::VK_ARM_TARGET1
89 : MCSymbolRefExpr::VK_None),
92 OutStreamer.EmitValue(E, Size);
95 /// runOnMachineFunction - This uses the EmitInstruction()
96 /// method to print assembly for each instruction.
98 bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
99 AFI = MF.getInfo<ARMFunctionInfo>();
100 MCP = MF.getConstantPool();
102 SetupMachineFunction(MF);
104 if (Subtarget->isTargetCOFF()) {
105 bool Internal = MF.getFunction()->hasInternalLinkage();
106 COFF::SymbolStorageClass Scl = Internal ? COFF::IMAGE_SYM_CLASS_STATIC
107 : COFF::IMAGE_SYM_CLASS_EXTERNAL;
108 int Type = COFF::IMAGE_SYM_DTYPE_FUNCTION << COFF::SCT_COMPLEX_TYPE_SHIFT;
110 OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
111 OutStreamer.EmitCOFFSymbolStorageClass(Scl);
112 OutStreamer.EmitCOFFSymbolType(Type);
113 OutStreamer.EndCOFFSymbolDef();
116 // Have common code print out the function header with linkage info etc.
117 EmitFunctionHeader();
119 // Emit the rest of the function body.
122 // We didn't modify anything.
126 void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
127 raw_ostream &O, const char *Modifier) {
128 const MachineOperand &MO = MI->getOperand(OpNum);
129 unsigned TF = MO.getTargetFlags();
131 switch (MO.getType()) {
132 default: llvm_unreachable("<unknown operand type>");
133 case MachineOperand::MO_Register: {
134 unsigned Reg = MO.getReg();
135 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
136 assert(!MO.getSubReg() && "Subregs should be eliminated!");
137 if(ARM::GPRPairRegClass.contains(Reg)) {
138 const MachineFunction &MF = *MI->getParent()->getParent();
139 const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
140 Reg = TRI->getSubReg(Reg, ARM::gsub_0);
142 O << ARMInstPrinter::getRegisterName(Reg);
145 case MachineOperand::MO_Immediate: {
146 int64_t Imm = MO.getImm();
148 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
149 (TF == ARMII::MO_LO16))
151 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
152 (TF == ARMII::MO_HI16))
157 case MachineOperand::MO_MachineBasicBlock:
158 O << *MO.getMBB()->getSymbol();
160 case MachineOperand::MO_GlobalAddress: {
161 const GlobalValue *GV = MO.getGlobal();
162 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
163 (TF & ARMII::MO_LO16))
165 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
166 (TF & ARMII::MO_HI16))
168 O << *GetARMGVSymbol(GV, TF);
170 printOffset(MO.getOffset(), O);
171 if (TF == ARMII::MO_PLT)
175 case MachineOperand::MO_ConstantPoolIndex:
176 O << *GetCPISymbol(MO.getIndex());
181 //===--------------------------------------------------------------------===//
183 MCSymbol *ARMAsmPrinter::
184 GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const {
185 const DataLayout *DL = TM.getDataLayout();
186 SmallString<60> Name;
187 raw_svector_ostream(Name) << DL->getPrivateGlobalPrefix() << "JTI"
188 << getFunctionNumber() << '_' << uid << '_' << uid2;
189 return OutContext.GetOrCreateSymbol(Name.str());
193 MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel() const {
194 const DataLayout *DL = TM.getDataLayout();
195 SmallString<60> Name;
196 raw_svector_ostream(Name) << DL->getPrivateGlobalPrefix() << "SJLJEH"
197 << getFunctionNumber();
198 return OutContext.GetOrCreateSymbol(Name.str());
201 bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
202 unsigned AsmVariant, const char *ExtraCode,
204 // Does this asm operand have a single letter operand modifier?
205 if (ExtraCode && ExtraCode[0]) {
206 if (ExtraCode[1] != 0) return true; // Unknown modifier.
208 switch (ExtraCode[0]) {
210 // See if this is a generic print operand
211 return AsmPrinter::PrintAsmOperand(MI, OpNum, AsmVariant, ExtraCode, O);
212 case 'a': // Print as a memory address.
213 if (MI->getOperand(OpNum).isReg()) {
215 << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg())
220 case 'c': // Don't print "#" before an immediate operand.
221 if (!MI->getOperand(OpNum).isImm())
223 O << MI->getOperand(OpNum).getImm();
225 case 'P': // Print a VFP double precision register.
226 case 'q': // Print a NEON quad precision register.
227 printOperand(MI, OpNum, O);
229 case 'y': // Print a VFP single precision register as indexed double.
230 if (MI->getOperand(OpNum).isReg()) {
231 unsigned Reg = MI->getOperand(OpNum).getReg();
232 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
233 // Find the 'd' register that has this 's' register as a sub-register,
234 // and determine the lane number.
235 for (MCSuperRegIterator SR(Reg, TRI); SR.isValid(); ++SR) {
236 if (!ARM::DPRRegClass.contains(*SR))
238 bool Lane0 = TRI->getSubReg(*SR, ARM::ssub_0) == Reg;
239 O << ARMInstPrinter::getRegisterName(*SR) << (Lane0 ? "[0]" : "[1]");
244 case 'B': // Bitwise inverse of integer or symbol without a preceding #.
245 if (!MI->getOperand(OpNum).isImm())
247 O << ~(MI->getOperand(OpNum).getImm());
249 case 'L': // The low 16 bits of an immediate constant.
250 if (!MI->getOperand(OpNum).isImm())
252 O << (MI->getOperand(OpNum).getImm() & 0xffff);
254 case 'M': { // A register range suitable for LDM/STM.
255 if (!MI->getOperand(OpNum).isReg())
257 const MachineOperand &MO = MI->getOperand(OpNum);
258 unsigned RegBegin = MO.getReg();
259 // This takes advantage of the 2 operand-ness of ldm/stm and that we've
260 // already got the operands in registers that are operands to the
261 // inline asm statement.
263 if (ARM::GPRPairRegClass.contains(RegBegin)) {
264 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
265 unsigned Reg0 = TRI->getSubReg(RegBegin, ARM::gsub_0);
266 O << ARMInstPrinter::getRegisterName(Reg0) << ", ";
267 RegBegin = TRI->getSubReg(RegBegin, ARM::gsub_1);
269 O << ARMInstPrinter::getRegisterName(RegBegin);
271 // FIXME: The register allocator not only may not have given us the
272 // registers in sequence, but may not be in ascending registers. This
273 // will require changes in the register allocator that'll need to be
274 // propagated down here if the operands change.
275 unsigned RegOps = OpNum + 1;
276 while (MI->getOperand(RegOps).isReg()) {
278 << ARMInstPrinter::getRegisterName(MI->getOperand(RegOps).getReg());
286 case 'R': // The most significant register of a pair.
287 case 'Q': { // The least significant register of a pair.
290 const MachineOperand &FlagsOP = MI->getOperand(OpNum - 1);
291 if (!FlagsOP.isImm())
293 unsigned Flags = FlagsOP.getImm();
295 // This operand may not be the one that actually provides the register. If
296 // it's tied to a previous one then we should refer instead to that one
297 // for registers and their classes.
299 if (InlineAsm::isUseOperandTiedToDef(Flags, TiedIdx)) {
300 for (OpNum = InlineAsm::MIOp_FirstOperand; TiedIdx; --TiedIdx) {
301 unsigned OpFlags = MI->getOperand(OpNum).getImm();
302 OpNum += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
304 Flags = MI->getOperand(OpNum).getImm();
306 // Later code expects OpNum to be pointing at the register rather than
311 unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
313 InlineAsm::hasRegClassConstraint(Flags, RC);
314 if (RC == ARM::GPRPairRegClassID) {
317 const MachineOperand &MO = MI->getOperand(OpNum);
320 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
321 unsigned Reg = TRI->getSubReg(MO.getReg(), ExtraCode[0] == 'Q' ?
322 ARM::gsub_0 : ARM::gsub_1);
323 O << ARMInstPrinter::getRegisterName(Reg);
328 unsigned RegOp = ExtraCode[0] == 'Q' ? OpNum : OpNum + 1;
329 if (RegOp >= MI->getNumOperands())
331 const MachineOperand &MO = MI->getOperand(RegOp);
334 unsigned Reg = MO.getReg();
335 O << ARMInstPrinter::getRegisterName(Reg);
339 case 'e': // The low doubleword register of a NEON quad register.
340 case 'f': { // The high doubleword register of a NEON quad register.
341 if (!MI->getOperand(OpNum).isReg())
343 unsigned Reg = MI->getOperand(OpNum).getReg();
344 if (!ARM::QPRRegClass.contains(Reg))
346 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
347 unsigned SubReg = TRI->getSubReg(Reg, ExtraCode[0] == 'e' ?
348 ARM::dsub_0 : ARM::dsub_1);
349 O << ARMInstPrinter::getRegisterName(SubReg);
353 // This modifier is not yet supported.
354 case 'h': // A range of VFP/NEON registers suitable for VLD1/VST1.
356 case 'H': { // The highest-numbered register of a pair.
357 const MachineOperand &MO = MI->getOperand(OpNum);
360 const MachineFunction &MF = *MI->getParent()->getParent();
361 const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
362 unsigned Reg = MO.getReg();
363 if(!ARM::GPRPairRegClass.contains(Reg))
365 Reg = TRI->getSubReg(Reg, ARM::gsub_1);
366 O << ARMInstPrinter::getRegisterName(Reg);
372 printOperand(MI, OpNum, O);
376 bool ARMAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
377 unsigned OpNum, unsigned AsmVariant,
378 const char *ExtraCode,
380 // Does this asm operand have a single letter operand modifier?
381 if (ExtraCode && ExtraCode[0]) {
382 if (ExtraCode[1] != 0) return true; // Unknown modifier.
384 switch (ExtraCode[0]) {
385 case 'A': // A memory operand for a VLD1/VST1 instruction.
386 default: return true; // Unknown modifier.
387 case 'm': // The base register of a memory operand.
388 if (!MI->getOperand(OpNum).isReg())
390 O << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg());
395 const MachineOperand &MO = MI->getOperand(OpNum);
396 assert(MO.isReg() && "unexpected inline asm memory operand");
397 O << "[" << ARMInstPrinter::getRegisterName(MO.getReg()) << "]";
401 static bool isThumb(const MCSubtargetInfo& STI) {
402 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
405 void ARMAsmPrinter::emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
406 const MCSubtargetInfo *EndInfo) const {
407 // If either end mode is unknown (EndInfo == NULL) or different than
408 // the start mode, then restore the start mode.
409 const bool WasThumb = isThumb(StartInfo);
410 if (!EndInfo || WasThumb != isThumb(*EndInfo)) {
411 OutStreamer.EmitAssemblerFlag(WasThumb ? MCAF_Code16 : MCAF_Code32);
415 void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
416 if (Subtarget->isTargetMachO()) {
417 Reloc::Model RelocM = TM.getRelocationModel();
418 if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) {
419 // Declare all the text sections up front (before the DWARF sections
420 // emitted by AsmPrinter::doInitialization) so the assembler will keep
421 // them together at the beginning of the object file. This helps
422 // avoid out-of-range branches that are due a fundamental limitation of
423 // the way symbol offsets are encoded with the current Darwin ARM
425 const TargetLoweringObjectFileMachO &TLOFMacho =
426 static_cast<const TargetLoweringObjectFileMachO &>(
427 getObjFileLowering());
429 // Collect the set of sections our functions will go into.
430 SetVector<const MCSection *, SmallVector<const MCSection *, 8>,
431 SmallPtrSet<const MCSection *, 8> > TextSections;
432 // Default text section comes first.
433 TextSections.insert(TLOFMacho.getTextSection());
434 // Now any user defined text sections from function attributes.
435 for (Module::iterator F = M.begin(), e = M.end(); F != e; ++F)
436 if (!F->isDeclaration() && !F->hasAvailableExternallyLinkage())
437 TextSections.insert(TLOFMacho.SectionForGlobal(F, *Mang, TM));
438 // Now the coalescable sections.
439 TextSections.insert(TLOFMacho.getTextCoalSection());
440 TextSections.insert(TLOFMacho.getConstTextCoalSection());
442 // Emit the sections in the .s file header to fix the order.
443 for (unsigned i = 0, e = TextSections.size(); i != e; ++i)
444 OutStreamer.SwitchSection(TextSections[i]);
446 if (RelocM == Reloc::DynamicNoPIC) {
447 const MCSection *sect =
448 OutContext.getMachOSection("__TEXT", "__symbol_stub4",
449 MachO::S_SYMBOL_STUBS,
450 12, SectionKind::getText());
451 OutStreamer.SwitchSection(sect);
453 const MCSection *sect =
454 OutContext.getMachOSection("__TEXT", "__picsymbolstub4",
455 MachO::S_SYMBOL_STUBS,
456 16, SectionKind::getText());
457 OutStreamer.SwitchSection(sect);
459 const MCSection *StaticInitSect =
460 OutContext.getMachOSection("__TEXT", "__StaticInit",
462 MachO::S_ATTR_PURE_INSTRUCTIONS,
463 SectionKind::getText());
464 OutStreamer.SwitchSection(StaticInitSect);
467 // Compiling with debug info should not affect the code
468 // generation. Ensure the cstring section comes before the
469 // optional __DWARF secion. Otherwise, PC-relative loads would
470 // have to use different instruction sequences at "-g" in order to
471 // reach global data in the same object file.
472 OutStreamer.SwitchSection(getObjFileLowering().getCStringSection());
475 // Use unified assembler syntax.
476 OutStreamer.EmitAssemblerFlag(MCAF_SyntaxUnified);
478 // Emit ARM Build Attributes
479 if (Subtarget->isTargetELF())
484 emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel,
485 MachineModuleInfoImpl::StubValueTy &MCSym) {
487 OutStreamer.EmitLabel(StubLabel);
488 // .indirect_symbol _foo
489 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
492 // External to current translation unit.
493 OutStreamer.EmitIntValue(0, 4/*size*/);
495 // Internal to current translation unit.
497 // When we place the LSDA into the TEXT section, the type info
498 // pointers need to be indirect and pc-rel. We accomplish this by
499 // using NLPs; however, sometimes the types are local to the file.
500 // We need to fill in the value for the NLP in those cases.
501 OutStreamer.EmitValue(
502 MCSymbolRefExpr::Create(MCSym.getPointer(), OutStreamer.getContext()),
507 void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
508 if (Subtarget->isTargetMachO()) {
509 // All darwin targets use mach-o.
510 const TargetLoweringObjectFileMachO &TLOFMacho =
511 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
512 MachineModuleInfoMachO &MMIMacho =
513 MMI->getObjFileInfo<MachineModuleInfoMachO>();
515 // Output non-lazy-pointers for external and common global variables.
516 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
518 if (!Stubs.empty()) {
519 // Switch with ".non_lazy_symbol_pointer" directive.
520 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
523 for (auto &Stub : Stubs)
524 emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second);
527 OutStreamer.AddBlankLine();
530 Stubs = MMIMacho.GetHiddenGVStubList();
531 if (!Stubs.empty()) {
532 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
535 for (auto &Stub : Stubs)
536 emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second);
539 OutStreamer.AddBlankLine();
542 // Funny Darwin hack: This flag tells the linker that no global symbols
543 // contain code that falls through to other global symbols (e.g. the obvious
544 // implementation of multiple entry points). If this doesn't occur, the
545 // linker can safely perform dead code stripping. Since LLVM never
546 // generates code that does this, it is always safe to set.
547 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
550 // Emit a .data.rel section containing any stubs that were created.
551 if (Subtarget->isTargetELF()) {
552 const TargetLoweringObjectFileELF &TLOFELF =
553 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
555 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
557 // Output stubs for external and common global variables.
558 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
559 if (!Stubs.empty()) {
560 OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
561 const DataLayout *TD = TM.getDataLayout();
563 for (auto &stub: Stubs) {
564 OutStreamer.EmitLabel(stub.first);
565 OutStreamer.EmitSymbolValue(stub.second.getPointer(),
566 TD->getPointerSize(0));
573 //===----------------------------------------------------------------------===//
574 // Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
576 // The following seem like one-off assembler flags, but they actually need
577 // to appear in the .ARM.attributes section in ELF.
578 // Instead of subclassing the MCELFStreamer, we do the work here.
580 static ARMBuildAttrs::CPUArch getArchForCPU(StringRef CPU,
581 const ARMSubtarget *Subtarget) {
583 return ARMBuildAttrs::v5TEJ;
585 if (Subtarget->hasV8Ops())
586 return ARMBuildAttrs::v8;
587 else if (Subtarget->hasV7Ops()) {
588 if (Subtarget->isMClass() && Subtarget->hasThumb2DSP())
589 return ARMBuildAttrs::v7E_M;
590 return ARMBuildAttrs::v7;
591 } else if (Subtarget->hasV6T2Ops())
592 return ARMBuildAttrs::v6T2;
593 else if (Subtarget->hasV6MOps())
594 return ARMBuildAttrs::v6S_M;
595 else if (Subtarget->hasV6Ops())
596 return ARMBuildAttrs::v6;
597 else if (Subtarget->hasV5TEOps())
598 return ARMBuildAttrs::v5TE;
599 else if (Subtarget->hasV5TOps())
600 return ARMBuildAttrs::v5T;
601 else if (Subtarget->hasV4TOps())
602 return ARMBuildAttrs::v4T;
604 return ARMBuildAttrs::v4;
607 void ARMAsmPrinter::emitAttributes() {
608 MCTargetStreamer &TS = *OutStreamer.getTargetStreamer();
609 ARMTargetStreamer &ATS = static_cast<ARMTargetStreamer &>(TS);
611 ATS.switchVendor("aeabi");
613 std::string CPUString = Subtarget->getCPUString();
615 // FIXME: remove krait check when GNU tools support krait cpu
616 if (CPUString != "generic" && CPUString != "krait")
617 ATS.emitTextAttribute(ARMBuildAttrs::CPU_name, CPUString);
619 ATS.emitAttribute(ARMBuildAttrs::CPU_arch,
620 getArchForCPU(CPUString, Subtarget));
622 // Tag_CPU_arch_profile must have the default value of 0 when "Architecture
623 // profile is not applicable (e.g. pre v7, or cross-profile code)".
624 if (Subtarget->hasV7Ops()) {
625 if (Subtarget->isAClass()) {
626 ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
627 ARMBuildAttrs::ApplicationProfile);
628 } else if (Subtarget->isRClass()) {
629 ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
630 ARMBuildAttrs::RealTimeProfile);
631 } else if (Subtarget->isMClass()) {
632 ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
633 ARMBuildAttrs::MicroControllerProfile);
637 ATS.emitAttribute(ARMBuildAttrs::ARM_ISA_use, Subtarget->hasARMOps() ?
638 ARMBuildAttrs::Allowed : ARMBuildAttrs::Not_Allowed);
639 if (Subtarget->isThumb1Only()) {
640 ATS.emitAttribute(ARMBuildAttrs::THUMB_ISA_use,
641 ARMBuildAttrs::Allowed);
642 } else if (Subtarget->hasThumb2()) {
643 ATS.emitAttribute(ARMBuildAttrs::THUMB_ISA_use,
644 ARMBuildAttrs::AllowThumb32);
647 if (Subtarget->hasNEON()) {
648 /* NEON is not exactly a VFP architecture, but GAS emit one of
649 * neon/neon-fp-armv8/neon-vfpv4/vfpv3/vfpv2 for .fpu parameters */
650 if (Subtarget->hasFPARMv8()) {
651 if (Subtarget->hasCrypto())
652 ATS.emitFPU(ARM::CRYPTO_NEON_FP_ARMV8);
654 ATS.emitFPU(ARM::NEON_FP_ARMV8);
656 else if (Subtarget->hasVFP4())
657 ATS.emitFPU(ARM::NEON_VFPV4);
659 ATS.emitFPU(ARM::NEON);
660 // Emit Tag_Advanced_SIMD_arch for ARMv8 architecture
661 if (Subtarget->hasV8Ops())
662 ATS.emitAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
663 ARMBuildAttrs::AllowNeonARMv8);
665 if (Subtarget->hasFPARMv8())
666 ATS.emitFPU(ARM::FP_ARMV8);
667 else if (Subtarget->hasVFP4())
668 ATS.emitFPU(Subtarget->hasD16() ? ARM::VFPV4_D16 : ARM::VFPV4);
669 else if (Subtarget->hasVFP3())
670 ATS.emitFPU(Subtarget->hasD16() ? ARM::VFPV3_D16 : ARM::VFPV3);
671 else if (Subtarget->hasVFP2())
672 ATS.emitFPU(ARM::VFPV2);
675 if (TM.getRelocationModel() == Reloc::PIC_) {
676 // PIC specific attributes.
677 ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RW_data,
678 ARMBuildAttrs::AddressRWPCRel);
679 ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RO_data,
680 ARMBuildAttrs::AddressROPCRel);
681 ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use,
682 ARMBuildAttrs::AddressGOT);
684 // Allow direct addressing of imported data for all other relocation models.
685 ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use,
686 ARMBuildAttrs::AddressDirect);
689 // Signal various FP modes.
690 if (!TM.Options.UnsafeFPMath) {
691 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_denormal, ARMBuildAttrs::Allowed);
692 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
693 ARMBuildAttrs::Allowed);
696 if (TM.Options.NoInfsFPMath && TM.Options.NoNaNsFPMath)
697 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_number_model,
698 ARMBuildAttrs::Allowed);
700 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_number_model,
701 ARMBuildAttrs::AllowIEE754);
703 // FIXME: add more flags to ARMBuildAttributes.h
704 // 8-bytes alignment stuff.
705 ATS.emitAttribute(ARMBuildAttrs::ABI_align_needed, 1);
706 ATS.emitAttribute(ARMBuildAttrs::ABI_align_preserved, 1);
708 // ABI_HardFP_use attribute to indicate single precision FP.
709 if (Subtarget->isFPOnlySP())
710 ATS.emitAttribute(ARMBuildAttrs::ABI_HardFP_use,
711 ARMBuildAttrs::HardFPSinglePrecision);
713 // Hard float. Use both S and D registers and conform to AAPCS-VFP.
714 if (Subtarget->isAAPCS_ABI() && TM.Options.FloatABIType == FloatABI::Hard)
715 ATS.emitAttribute(ARMBuildAttrs::ABI_VFP_args, ARMBuildAttrs::HardFPAAPCS);
717 // FIXME: Should we signal R9 usage?
719 if (Subtarget->hasFP16())
720 ATS.emitAttribute(ARMBuildAttrs::FP_HP_extension, ARMBuildAttrs::AllowHPFP);
722 if (Subtarget->hasMPExtension())
723 ATS.emitAttribute(ARMBuildAttrs::MPextension_use, ARMBuildAttrs::AllowMP);
725 // Hardware divide in ARM mode is part of base arch, starting from ARMv8.
726 // If only Thumb hwdiv is present, it must also be in base arch (ARMv7-R/M).
727 // It is not possible to produce DisallowDIV: if hwdiv is present in the base
728 // arch, supplying -hwdiv downgrades the effective arch, via ClearImpliedBits.
729 // AllowDIVExt is only emitted if hwdiv isn't available in the base arch;
730 // otherwise, the default value (AllowDIVIfExists) applies.
731 if (Subtarget->hasDivideInARMMode() && !Subtarget->hasV8Ops())
732 ATS.emitAttribute(ARMBuildAttrs::DIV_use, ARMBuildAttrs::AllowDIVExt);
735 if (const Module *SourceModule = MMI->getModule()) {
736 // ABI_PCS_wchar_t to indicate wchar_t width
737 // FIXME: There is no way to emit value 0 (wchar_t prohibited).
738 if (auto WCharWidthValue = cast_or_null<ConstantInt>(
739 SourceModule->getModuleFlag("wchar_size"))) {
740 int WCharWidth = WCharWidthValue->getZExtValue();
741 assert((WCharWidth == 2 || WCharWidth == 4) &&
742 "wchar_t width must be 2 or 4 bytes");
743 ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_wchar_t, WCharWidth);
746 // ABI_enum_size to indicate enum width
747 // FIXME: There is no way to emit value 0 (enums prohibited) or value 3
748 // (all enums contain a value needing 32 bits to encode).
749 if (auto EnumWidthValue = cast_or_null<ConstantInt>(
750 SourceModule->getModuleFlag("min_enum_size"))) {
751 int EnumWidth = EnumWidthValue->getZExtValue();
752 assert((EnumWidth == 1 || EnumWidth == 4) &&
753 "Minimum enum width must be 1 or 4 bytes");
754 int EnumBuildAttr = EnumWidth == 1 ? 1 : 2;
755 ATS.emitAttribute(ARMBuildAttrs::ABI_enum_size, EnumBuildAttr);
760 if (Subtarget->hasTrustZone() && Subtarget->hasVirtualization())
761 ATS.emitAttribute(ARMBuildAttrs::Virtualization_use,
762 ARMBuildAttrs::AllowTZVirtualization);
763 else if (Subtarget->hasTrustZone())
764 ATS.emitAttribute(ARMBuildAttrs::Virtualization_use,
765 ARMBuildAttrs::AllowTZ);
766 else if (Subtarget->hasVirtualization())
767 ATS.emitAttribute(ARMBuildAttrs::Virtualization_use,
768 ARMBuildAttrs::AllowVirtualization);
770 ATS.finishAttributeSection();
773 //===----------------------------------------------------------------------===//
775 static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
776 unsigned LabelId, MCContext &Ctx) {
778 MCSymbol *Label = Ctx.GetOrCreateSymbol(Twine(Prefix)
779 + "PC" + Twine(FunctionNumber) + "_" + Twine(LabelId));
783 static MCSymbolRefExpr::VariantKind
784 getModifierVariantKind(ARMCP::ARMCPModifier Modifier) {
786 case ARMCP::no_modifier: return MCSymbolRefExpr::VK_None;
787 case ARMCP::TLSGD: return MCSymbolRefExpr::VK_TLSGD;
788 case ARMCP::TPOFF: return MCSymbolRefExpr::VK_TPOFF;
789 case ARMCP::GOTTPOFF: return MCSymbolRefExpr::VK_GOTTPOFF;
790 case ARMCP::GOT: return MCSymbolRefExpr::VK_GOT;
791 case ARMCP::GOTOFF: return MCSymbolRefExpr::VK_GOTOFF;
793 llvm_unreachable("Invalid ARMCPModifier!");
796 MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV,
797 unsigned char TargetFlags) {
798 if (Subtarget->isTargetMachO()) {
799 bool IsIndirect = (TargetFlags & ARMII::MO_NONLAZY) &&
800 Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
803 return getSymbol(GV);
805 // FIXME: Remove this when Darwin transition to @GOT like syntax.
806 MCSymbol *MCSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
807 MachineModuleInfoMachO &MMIMachO =
808 MMI->getObjFileInfo<MachineModuleInfoMachO>();
809 MachineModuleInfoImpl::StubValueTy &StubSym =
810 GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym)
811 : MMIMachO.getGVStubEntry(MCSym);
812 if (!StubSym.getPointer())
813 StubSym = MachineModuleInfoImpl::StubValueTy(getSymbol(GV),
814 !GV->hasInternalLinkage());
816 } else if (Subtarget->isTargetCOFF()) {
817 assert(Subtarget->isTargetWindows() &&
818 "Windows is the only supported COFF target");
820 bool IsIndirect = (TargetFlags & ARMII::MO_DLLIMPORT);
822 return getSymbol(GV);
824 SmallString<128> Name;
826 getNameWithPrefix(Name, GV);
828 return OutContext.GetOrCreateSymbol(Name);
829 } else if (Subtarget->isTargetELF()) {
830 return getSymbol(GV);
832 llvm_unreachable("unexpected target");
836 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
837 const DataLayout *DL = TM.getDataLayout();
838 int Size = TM.getDataLayout()->getTypeAllocSize(MCPV->getType());
840 ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
843 if (ACPV->isLSDA()) {
844 SmallString<128> Str;
845 raw_svector_ostream OS(Str);
846 OS << DL->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
847 MCSym = OutContext.GetOrCreateSymbol(OS.str());
848 } else if (ACPV->isBlockAddress()) {
849 const BlockAddress *BA =
850 cast<ARMConstantPoolConstant>(ACPV)->getBlockAddress();
851 MCSym = GetBlockAddressSymbol(BA);
852 } else if (ACPV->isGlobalValue()) {
853 const GlobalValue *GV = cast<ARMConstantPoolConstant>(ACPV)->getGV();
855 // On Darwin, const-pool entries may get the "FOO$non_lazy_ptr" mangling, so
856 // flag the global as MO_NONLAZY.
857 unsigned char TF = Subtarget->isTargetMachO() ? ARMII::MO_NONLAZY : 0;
858 MCSym = GetARMGVSymbol(GV, TF);
859 } else if (ACPV->isMachineBasicBlock()) {
860 const MachineBasicBlock *MBB = cast<ARMConstantPoolMBB>(ACPV)->getMBB();
861 MCSym = MBB->getSymbol();
863 assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
864 const char *Sym = cast<ARMConstantPoolSymbol>(ACPV)->getSymbol();
865 MCSym = GetExternalSymbolSymbol(Sym);
868 // Create an MCSymbol for the reference.
870 MCSymbolRefExpr::Create(MCSym, getModifierVariantKind(ACPV->getModifier()),
873 if (ACPV->getPCAdjustment()) {
874 MCSymbol *PCLabel = getPICLabel(DL->getPrivateGlobalPrefix(),
878 const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
880 MCBinaryExpr::CreateAdd(PCRelExpr,
881 MCConstantExpr::Create(ACPV->getPCAdjustment(),
884 if (ACPV->mustAddCurrentAddress()) {
885 // We want "(<expr> - .)", but MC doesn't have a concept of the '.'
886 // label, so just emit a local label end reference that instead.
887 MCSymbol *DotSym = OutContext.CreateTempSymbol();
888 OutStreamer.EmitLabel(DotSym);
889 const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
890 PCRelExpr = MCBinaryExpr::CreateSub(PCRelExpr, DotExpr, OutContext);
892 Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
894 OutStreamer.EmitValue(Expr, Size);
897 void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
898 unsigned Opcode = MI->getOpcode();
900 if (Opcode == ARM::BR_JTadd)
902 else if (Opcode == ARM::BR_JTm)
905 const MachineOperand &MO1 = MI->getOperand(OpNum);
906 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
907 unsigned JTI = MO1.getIndex();
909 // Emit a label for the jump table.
910 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
911 OutStreamer.EmitLabel(JTISymbol);
913 // Mark the jump table as data-in-code.
914 OutStreamer.EmitDataRegion(MCDR_DataRegionJT32);
916 // Emit each entry of the table.
917 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
918 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
919 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
921 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
922 MachineBasicBlock *MBB = JTBBs[i];
923 // Construct an MCExpr for the entry. We want a value of the form:
924 // (BasicBlockAddr - TableBeginAddr)
926 // For example, a table with entries jumping to basic blocks BB0 and BB1
929 // .word (LBB0 - LJTI_0_0)
930 // .word (LBB1 - LJTI_0_0)
931 const MCExpr *Expr = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
933 if (TM.getRelocationModel() == Reloc::PIC_)
934 Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
937 // If we're generating a table of Thumb addresses in static relocation
938 // model, we need to add one to keep interworking correctly.
939 else if (AFI->isThumbFunction())
940 Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(1,OutContext),
942 OutStreamer.EmitValue(Expr, 4);
944 // Mark the end of jump table data-in-code region.
945 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
948 void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
949 unsigned Opcode = MI->getOpcode();
950 int OpNum = (Opcode == ARM::t2BR_JT) ? 2 : 1;
951 const MachineOperand &MO1 = MI->getOperand(OpNum);
952 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
953 unsigned JTI = MO1.getIndex();
955 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
956 OutStreamer.EmitLabel(JTISymbol);
958 // Emit each entry of the table.
959 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
960 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
961 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
962 unsigned OffsetWidth = 4;
963 if (MI->getOpcode() == ARM::t2TBB_JT) {
965 // Mark the jump table as data-in-code.
966 OutStreamer.EmitDataRegion(MCDR_DataRegionJT8);
967 } else if (MI->getOpcode() == ARM::t2TBH_JT) {
969 // Mark the jump table as data-in-code.
970 OutStreamer.EmitDataRegion(MCDR_DataRegionJT16);
973 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
974 MachineBasicBlock *MBB = JTBBs[i];
975 const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(),
977 // If this isn't a TBB or TBH, the entries are direct branch instructions.
978 if (OffsetWidth == 4) {
979 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::t2B)
980 .addExpr(MBBSymbolExpr)
985 // Otherwise it's an offset from the dispatch instruction. Construct an
986 // MCExpr for the entry. We want a value of the form:
987 // (BasicBlockAddr - TableBeginAddr) / 2
989 // For example, a TBB table with entries jumping to basic blocks BB0 and BB1
992 // .byte (LBB0 - LJTI_0_0) / 2
993 // .byte (LBB1 - LJTI_0_0) / 2
995 MCBinaryExpr::CreateSub(MBBSymbolExpr,
996 MCSymbolRefExpr::Create(JTISymbol, OutContext),
998 Expr = MCBinaryExpr::CreateDiv(Expr, MCConstantExpr::Create(2, OutContext),
1000 OutStreamer.EmitValue(Expr, OffsetWidth);
1002 // Mark the end of jump table data-in-code region. 32-bit offsets use
1003 // actual branch instructions here, so we don't mark those as a data-region
1005 if (OffsetWidth != 4)
1006 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1009 void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
1010 assert(MI->getFlag(MachineInstr::FrameSetup) &&
1011 "Only instruction which are involved into frame setup code are allowed");
1013 MCTargetStreamer &TS = *OutStreamer.getTargetStreamer();
1014 ARMTargetStreamer &ATS = static_cast<ARMTargetStreamer &>(TS);
1015 const MachineFunction &MF = *MI->getParent()->getParent();
1016 const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
1017 const ARMFunctionInfo &AFI = *MF.getInfo<ARMFunctionInfo>();
1019 unsigned FramePtr = RegInfo->getFrameRegister(MF);
1020 unsigned Opc = MI->getOpcode();
1021 unsigned SrcReg, DstReg;
1023 if (Opc == ARM::tPUSH || Opc == ARM::tLDRpci) {
1024 // Two special cases:
1025 // 1) tPUSH does not have src/dst regs.
1026 // 2) for Thumb1 code we sometimes materialize the constant via constpool
1027 // load. Yes, this is pretty fragile, but for now I don't see better
1029 SrcReg = DstReg = ARM::SP;
1031 SrcReg = MI->getOperand(1).getReg();
1032 DstReg = MI->getOperand(0).getReg();
1035 // Try to figure out the unwinding opcode out of src / dst regs.
1036 if (MI->mayStore()) {
1038 assert(DstReg == ARM::SP &&
1039 "Only stack pointer as a destination reg is supported");
1041 SmallVector<unsigned, 4> RegList;
1042 // Skip src & dst reg, and pred ops.
1043 unsigned StartOp = 2 + 2;
1044 // Use all the operands.
1045 unsigned NumOffset = 0;
1050 llvm_unreachable("Unsupported opcode for unwinding information");
1052 // Special case here: no src & dst reg, but two extra imp ops.
1053 StartOp = 2; NumOffset = 2;
1054 case ARM::STMDB_UPD:
1055 case ARM::t2STMDB_UPD:
1056 case ARM::VSTMDDB_UPD:
1057 assert(SrcReg == ARM::SP &&
1058 "Only stack pointer as a source reg is supported");
1059 for (unsigned i = StartOp, NumOps = MI->getNumOperands() - NumOffset;
1061 const MachineOperand &MO = MI->getOperand(i);
1062 // Actually, there should never be any impdef stuff here. Skip it
1063 // temporary to workaround PR11902.
1064 if (MO.isImplicit())
1066 RegList.push_back(MO.getReg());
1069 case ARM::STR_PRE_IMM:
1070 case ARM::STR_PRE_REG:
1071 case ARM::t2STR_PRE:
1072 assert(MI->getOperand(2).getReg() == ARM::SP &&
1073 "Only stack pointer as a source reg is supported");
1074 RegList.push_back(SrcReg);
1077 if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
1078 ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
1080 // Changes of stack / frame pointer.
1081 if (SrcReg == ARM::SP) {
1086 llvm_unreachable("Unsupported opcode for unwinding information");
1092 Offset = -MI->getOperand(2).getImm();
1096 Offset = MI->getOperand(2).getImm();
1099 Offset = MI->getOperand(2).getImm()*4;
1103 Offset = -MI->getOperand(2).getImm()*4;
1105 case ARM::tLDRpci: {
1106 // Grab the constpool index and check, whether it corresponds to
1107 // original or cloned constpool entry.
1108 unsigned CPI = MI->getOperand(1).getIndex();
1109 const MachineConstantPool *MCP = MF.getConstantPool();
1110 if (CPI >= MCP->getConstants().size())
1111 CPI = AFI.getOriginalCPIdx(CPI);
1112 assert(CPI != -1U && "Invalid constpool index");
1114 // Derive the actual offset.
1115 const MachineConstantPoolEntry &CPE = MCP->getConstants()[CPI];
1116 assert(!CPE.isMachineConstantPoolEntry() && "Invalid constpool entry");
1117 // FIXME: Check for user, it should be "add" instruction!
1118 Offset = -cast<ConstantInt>(CPE.Val.ConstVal)->getSExtValue();
1123 if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM) {
1124 if (DstReg == FramePtr && FramePtr != ARM::SP)
1125 // Set-up of the frame pointer. Positive values correspond to "add"
1127 ATS.emitSetFP(FramePtr, ARM::SP, -Offset);
1128 else if (DstReg == ARM::SP) {
1129 // Change of SP by an offset. Positive values correspond to "sub"
1131 ATS.emitPad(Offset);
1133 // Move of SP to a register. Positive values correspond to an "add"
1135 ATS.emitMovSP(DstReg, -Offset);
1138 } else if (DstReg == ARM::SP) {
1140 llvm_unreachable("Unsupported opcode for unwinding information");
1144 llvm_unreachable("Unsupported opcode for unwinding information");
1149 // Simple pseudo-instructions have their lowering (with expansion to real
1150 // instructions) auto-generated.
1151 #include "ARMGenMCPseudoLowering.inc"
1153 void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
1154 const DataLayout *DL = TM.getDataLayout();
1156 // If we just ended a constant pool, mark it as such.
1157 if (InConstantPool && MI->getOpcode() != ARM::CONSTPOOL_ENTRY) {
1158 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1159 InConstantPool = false;
1162 // Emit unwinding stuff for frame-related instructions
1163 if (Subtarget->isTargetEHABICompatible() &&
1164 MI->getFlag(MachineInstr::FrameSetup))
1165 EmitUnwindingInstruction(MI);
1167 // Do any auto-generated pseudo lowerings.
1168 if (emitPseudoExpansionLowering(OutStreamer, MI))
1171 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
1172 "Pseudo flag setting opcode should be expanded early");
1174 // Check for manual lowerings.
1175 unsigned Opc = MI->getOpcode();
1177 case ARM::t2MOVi32imm: llvm_unreachable("Should be lowered by thumb2it pass");
1178 case ARM::DBG_VALUE: llvm_unreachable("Should be handled by generic printing");
1180 case ARM::tLEApcrel:
1181 case ARM::t2LEApcrel: {
1182 // FIXME: Need to also handle globals and externals
1183 MCSymbol *CPISymbol = GetCPISymbol(MI->getOperand(1).getIndex());
1184 EmitToStreamer(OutStreamer, MCInstBuilder(MI->getOpcode() ==
1185 ARM::t2LEApcrel ? ARM::t2ADR
1186 : (MI->getOpcode() == ARM::tLEApcrel ? ARM::tADR
1188 .addReg(MI->getOperand(0).getReg())
1189 .addExpr(MCSymbolRefExpr::Create(CPISymbol, OutContext))
1190 // Add predicate operands.
1191 .addImm(MI->getOperand(2).getImm())
1192 .addReg(MI->getOperand(3).getReg()));
1195 case ARM::LEApcrelJT:
1196 case ARM::tLEApcrelJT:
1197 case ARM::t2LEApcrelJT: {
1198 MCSymbol *JTIPICSymbol =
1199 GetARMJTIPICJumpTableLabel2(MI->getOperand(1).getIndex(),
1200 MI->getOperand(2).getImm());
1201 EmitToStreamer(OutStreamer, MCInstBuilder(MI->getOpcode() ==
1202 ARM::t2LEApcrelJT ? ARM::t2ADR
1203 : (MI->getOpcode() == ARM::tLEApcrelJT ? ARM::tADR
1205 .addReg(MI->getOperand(0).getReg())
1206 .addExpr(MCSymbolRefExpr::Create(JTIPICSymbol, OutContext))
1207 // Add predicate operands.
1208 .addImm(MI->getOperand(3).getImm())
1209 .addReg(MI->getOperand(4).getReg()));
1212 // Darwin call instructions are just normal call instructions with different
1213 // clobber semantics (they clobber R9).
1214 case ARM::BX_CALL: {
1215 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::MOVr)
1218 // Add predicate operands.
1221 // Add 's' bit operand (always reg0 for this)
1224 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::BX)
1225 .addReg(MI->getOperand(0).getReg()));
1228 case ARM::tBX_CALL: {
1229 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tMOVr)
1232 // Add predicate operands.
1236 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tBX)
1237 .addReg(MI->getOperand(0).getReg())
1238 // Add predicate operands.
1243 case ARM::BMOVPCRX_CALL: {
1244 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::MOVr)
1247 // Add predicate operands.
1250 // Add 's' bit operand (always reg0 for this)
1253 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::MOVr)
1255 .addReg(MI->getOperand(0).getReg())
1256 // Add predicate operands.
1259 // Add 's' bit operand (always reg0 for this)
1263 case ARM::BMOVPCB_CALL: {
1264 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::MOVr)
1267 // Add predicate operands.
1270 // Add 's' bit operand (always reg0 for this)
1273 const MachineOperand &Op = MI->getOperand(0);
1274 const GlobalValue *GV = Op.getGlobal();
1275 const unsigned TF = Op.getTargetFlags();
1276 MCSymbol *GVSym = GetARMGVSymbol(GV, TF);
1277 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1278 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::Bcc)
1280 // Add predicate operands.
1285 case ARM::MOVi16_ga_pcrel:
1286 case ARM::t2MOVi16_ga_pcrel: {
1288 TmpInst.setOpcode(Opc == ARM::MOVi16_ga_pcrel? ARM::MOVi16 : ARM::t2MOVi16);
1289 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1291 unsigned TF = MI->getOperand(1).getTargetFlags();
1292 const GlobalValue *GV = MI->getOperand(1).getGlobal();
1293 MCSymbol *GVSym = GetARMGVSymbol(GV, TF);
1294 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1296 MCSymbol *LabelSym = getPICLabel(DL->getPrivateGlobalPrefix(),
1297 getFunctionNumber(),
1298 MI->getOperand(2).getImm(), OutContext);
1299 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1300 unsigned PCAdj = (Opc == ARM::MOVi16_ga_pcrel) ? 8 : 4;
1301 const MCExpr *PCRelExpr =
1302 ARMMCExpr::CreateLower16(MCBinaryExpr::CreateSub(GVSymExpr,
1303 MCBinaryExpr::CreateAdd(LabelSymExpr,
1304 MCConstantExpr::Create(PCAdj, OutContext),
1305 OutContext), OutContext), OutContext);
1306 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1308 // Add predicate operands.
1309 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1310 TmpInst.addOperand(MCOperand::CreateReg(0));
1311 // Add 's' bit operand (always reg0 for this)
1312 TmpInst.addOperand(MCOperand::CreateReg(0));
1313 EmitToStreamer(OutStreamer, TmpInst);
1316 case ARM::MOVTi16_ga_pcrel:
1317 case ARM::t2MOVTi16_ga_pcrel: {
1319 TmpInst.setOpcode(Opc == ARM::MOVTi16_ga_pcrel
1320 ? ARM::MOVTi16 : ARM::t2MOVTi16);
1321 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1322 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1324 unsigned TF = MI->getOperand(2).getTargetFlags();
1325 const GlobalValue *GV = MI->getOperand(2).getGlobal();
1326 MCSymbol *GVSym = GetARMGVSymbol(GV, TF);
1327 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1329 MCSymbol *LabelSym = getPICLabel(DL->getPrivateGlobalPrefix(),
1330 getFunctionNumber(),
1331 MI->getOperand(3).getImm(), OutContext);
1332 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1333 unsigned PCAdj = (Opc == ARM::MOVTi16_ga_pcrel) ? 8 : 4;
1334 const MCExpr *PCRelExpr =
1335 ARMMCExpr::CreateUpper16(MCBinaryExpr::CreateSub(GVSymExpr,
1336 MCBinaryExpr::CreateAdd(LabelSymExpr,
1337 MCConstantExpr::Create(PCAdj, OutContext),
1338 OutContext), OutContext), OutContext);
1339 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1340 // Add predicate operands.
1341 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1342 TmpInst.addOperand(MCOperand::CreateReg(0));
1343 // Add 's' bit operand (always reg0 for this)
1344 TmpInst.addOperand(MCOperand::CreateReg(0));
1345 EmitToStreamer(OutStreamer, TmpInst);
1348 case ARM::tPICADD: {
1349 // This is a pseudo op for a label + instruction sequence, which looks like:
1352 // This adds the address of LPC0 to r0.
1355 OutStreamer.EmitLabel(getPICLabel(DL->getPrivateGlobalPrefix(),
1356 getFunctionNumber(), MI->getOperand(2).getImm(),
1359 // Form and emit the add.
1360 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tADDhirr)
1361 .addReg(MI->getOperand(0).getReg())
1362 .addReg(MI->getOperand(0).getReg())
1364 // Add predicate operands.
1370 // This is a pseudo op for a label + instruction sequence, which looks like:
1373 // This adds the address of LPC0 to r0.
1376 OutStreamer.EmitLabel(getPICLabel(DL->getPrivateGlobalPrefix(),
1377 getFunctionNumber(), MI->getOperand(2).getImm(),
1380 // Form and emit the add.
1381 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::ADDrr)
1382 .addReg(MI->getOperand(0).getReg())
1384 .addReg(MI->getOperand(1).getReg())
1385 // Add predicate operands.
1386 .addImm(MI->getOperand(3).getImm())
1387 .addReg(MI->getOperand(4).getReg())
1388 // Add 's' bit operand (always reg0 for this)
1399 case ARM::PICLDRSH: {
1400 // This is a pseudo op for a label + instruction sequence, which looks like:
1403 // The LCP0 label is referenced by a constant pool entry in order to get
1404 // a PC-relative address at the ldr instruction.
1407 OutStreamer.EmitLabel(getPICLabel(DL->getPrivateGlobalPrefix(),
1408 getFunctionNumber(), MI->getOperand(2).getImm(),
1411 // Form and emit the load
1413 switch (MI->getOpcode()) {
1415 llvm_unreachable("Unexpected opcode!");
1416 case ARM::PICSTR: Opcode = ARM::STRrs; break;
1417 case ARM::PICSTRB: Opcode = ARM::STRBrs; break;
1418 case ARM::PICSTRH: Opcode = ARM::STRH; break;
1419 case ARM::PICLDR: Opcode = ARM::LDRrs; break;
1420 case ARM::PICLDRB: Opcode = ARM::LDRBrs; break;
1421 case ARM::PICLDRH: Opcode = ARM::LDRH; break;
1422 case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
1423 case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
1425 EmitToStreamer(OutStreamer, MCInstBuilder(Opcode)
1426 .addReg(MI->getOperand(0).getReg())
1428 .addReg(MI->getOperand(1).getReg())
1430 // Add predicate operands.
1431 .addImm(MI->getOperand(3).getImm())
1432 .addReg(MI->getOperand(4).getReg()));
1436 case ARM::CONSTPOOL_ENTRY: {
1437 /// CONSTPOOL_ENTRY - This instruction represents a floating constant pool
1438 /// in the function. The first operand is the ID# for this instruction, the
1439 /// second is the index into the MachineConstantPool that this is, the third
1440 /// is the size in bytes of this constant pool entry.
1441 /// The required alignment is specified on the basic block holding this MI.
1442 unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
1443 unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
1445 // If this is the first entry of the pool, mark it.
1446 if (!InConstantPool) {
1447 OutStreamer.EmitDataRegion(MCDR_DataRegion);
1448 InConstantPool = true;
1451 OutStreamer.EmitLabel(GetCPISymbol(LabelId));
1453 const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
1454 if (MCPE.isMachineConstantPoolEntry())
1455 EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
1457 EmitGlobalConstant(MCPE.Val.ConstVal);
1460 case ARM::t2BR_JT: {
1461 // Lower and emit the instruction itself, then the jump table following it.
1462 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tMOVr)
1464 .addReg(MI->getOperand(0).getReg())
1465 // Add predicate operands.
1469 // Output the data for the jump table itself
1473 case ARM::t2TBB_JT: {
1474 // Lower and emit the instruction itself, then the jump table following it.
1475 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::t2TBB)
1477 .addReg(MI->getOperand(0).getReg())
1478 // Add predicate operands.
1482 // Output the data for the jump table itself
1484 // Make sure the next instruction is 2-byte aligned.
1488 case ARM::t2TBH_JT: {
1489 // Lower and emit the instruction itself, then the jump table following it.
1490 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::t2TBH)
1492 .addReg(MI->getOperand(0).getReg())
1493 // Add predicate operands.
1497 // Output the data for the jump table itself
1503 // Lower and emit the instruction itself, then the jump table following it.
1506 unsigned Opc = MI->getOpcode() == ARM::BR_JTr ?
1507 ARM::MOVr : ARM::tMOVr;
1508 TmpInst.setOpcode(Opc);
1509 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1510 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1511 // Add predicate operands.
1512 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1513 TmpInst.addOperand(MCOperand::CreateReg(0));
1514 // Add 's' bit operand (always reg0 for this)
1515 if (Opc == ARM::MOVr)
1516 TmpInst.addOperand(MCOperand::CreateReg(0));
1517 EmitToStreamer(OutStreamer, TmpInst);
1519 // Make sure the Thumb jump table is 4-byte aligned.
1520 if (Opc == ARM::tMOVr)
1523 // Output the data for the jump table itself
1528 // Lower and emit the instruction itself, then the jump table following it.
1531 if (MI->getOperand(1).getReg() == 0) {
1533 TmpInst.setOpcode(ARM::LDRi12);
1534 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1535 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1536 TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
1538 TmpInst.setOpcode(ARM::LDRrs);
1539 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1540 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1541 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1542 TmpInst.addOperand(MCOperand::CreateImm(0));
1544 // Add predicate operands.
1545 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1546 TmpInst.addOperand(MCOperand::CreateReg(0));
1547 EmitToStreamer(OutStreamer, TmpInst);
1549 // Output the data for the jump table itself
1553 case ARM::BR_JTadd: {
1554 // Lower and emit the instruction itself, then the jump table following it.
1555 // add pc, target, idx
1556 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::ADDrr)
1558 .addReg(MI->getOperand(0).getReg())
1559 .addReg(MI->getOperand(1).getReg())
1560 // Add predicate operands.
1563 // Add 's' bit operand (always reg0 for this)
1566 // Output the data for the jump table itself
1571 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1572 // FIXME: Remove this special case when they do.
1573 if (!Subtarget->isTargetMachO()) {
1574 //.long 0xe7ffdefe @ trap
1575 uint32_t Val = 0xe7ffdefeUL;
1576 OutStreamer.AddComment("trap");
1577 OutStreamer.EmitIntValue(Val, 4);
1582 case ARM::TRAPNaCl: {
1583 //.long 0xe7fedef0 @ trap
1584 uint32_t Val = 0xe7fedef0UL;
1585 OutStreamer.AddComment("trap");
1586 OutStreamer.EmitIntValue(Val, 4);
1590 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1591 // FIXME: Remove this special case when they do.
1592 if (!Subtarget->isTargetMachO()) {
1593 //.short 57086 @ trap
1594 uint16_t Val = 0xdefe;
1595 OutStreamer.AddComment("trap");
1596 OutStreamer.EmitIntValue(Val, 2);
1601 case ARM::t2Int_eh_sjlj_setjmp:
1602 case ARM::t2Int_eh_sjlj_setjmp_nofp:
1603 case ARM::tInt_eh_sjlj_setjmp: {
1604 // Two incoming args: GPR:$src, GPR:$val
1607 // str $val, [$src, #4]
1612 unsigned SrcReg = MI->getOperand(0).getReg();
1613 unsigned ValReg = MI->getOperand(1).getReg();
1614 MCSymbol *Label = GetARMSJLJEHLabel();
1615 OutStreamer.AddComment("eh_setjmp begin");
1616 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tMOVr)
1623 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tADDi3)
1633 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tSTRi)
1636 // The offset immediate is #4. The operand value is scaled by 4 for the
1637 // tSTR instruction.
1643 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tMOVi8)
1651 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, OutContext);
1652 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tB)
1653 .addExpr(SymbolExpr)
1657 OutStreamer.AddComment("eh_setjmp end");
1658 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tMOVi8)
1666 OutStreamer.EmitLabel(Label);
1670 case ARM::Int_eh_sjlj_setjmp_nofp:
1671 case ARM::Int_eh_sjlj_setjmp: {
1672 // Two incoming args: GPR:$src, GPR:$val
1674 // str $val, [$src, #+4]
1678 unsigned SrcReg = MI->getOperand(0).getReg();
1679 unsigned ValReg = MI->getOperand(1).getReg();
1681 OutStreamer.AddComment("eh_setjmp begin");
1682 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::ADDri)
1689 // 's' bit operand (always reg0 for this).
1692 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::STRi12)
1700 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::MOVi)
1706 // 's' bit operand (always reg0 for this).
1709 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::ADDri)
1716 // 's' bit operand (always reg0 for this).
1719 OutStreamer.AddComment("eh_setjmp end");
1720 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::MOVi)
1726 // 's' bit operand (always reg0 for this).
1730 case ARM::Int_eh_sjlj_longjmp: {
1731 // ldr sp, [$src, #8]
1732 // ldr $scratch, [$src, #4]
1735 unsigned SrcReg = MI->getOperand(0).getReg();
1736 unsigned ScratchReg = MI->getOperand(1).getReg();
1737 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::LDRi12)
1745 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::LDRi12)
1753 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::LDRi12)
1761 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::BX)
1768 case ARM::tInt_eh_sjlj_longjmp: {
1769 // ldr $scratch, [$src, #8]
1771 // ldr $scratch, [$src, #4]
1774 unsigned SrcReg = MI->getOperand(0).getReg();
1775 unsigned ScratchReg = MI->getOperand(1).getReg();
1776 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tLDRi)
1779 // The offset immediate is #8. The operand value is scaled by 4 for the
1780 // tLDR instruction.
1786 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tMOVr)
1793 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tLDRi)
1801 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tLDRi)
1809 EmitToStreamer(OutStreamer, MCInstBuilder(ARM::tBX)
1819 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1821 EmitToStreamer(OutStreamer, TmpInst);
1824 //===----------------------------------------------------------------------===//
1825 // Target Registry Stuff
1826 //===----------------------------------------------------------------------===//
1828 // Force static initialization.
1829 extern "C" void LLVMInitializeARMAsmPrinter() {
1830 RegisterAsmPrinter<ARMAsmPrinter> X(TheARMLETarget);
1831 RegisterAsmPrinter<ARMAsmPrinter> Y(TheARMBETarget);
1832 RegisterAsmPrinter<ARMAsmPrinter> A(TheThumbLETarget);
1833 RegisterAsmPrinter<ARMAsmPrinter> B(TheThumbBETarget);